1、 2016-2017 学 年 九 年 级一 模 数 学 参 考 答案 30 1 2 3 4 5 6 7 8 9 10 A B C C B A A C D A 18 11.-12 12.1 13. 6 514.114 15. 0a3 16. 5 10 6 8 72 17. 5x 2 3x 6 -3 2x 4 -6 x 2 -8 18. BE=CF BC=EF ABC DEF . , , EF BC DF AC DE AB ABC DEF(SSS), -5 B= DEF, AB DE.-8 19. 1 -3 2 (1) 60 2015 “ ” . 2015 365 “ ” . 2015 365 “
2、 ” “ ” 73+219=292 .- -6 3 2015 “ ” -8 20. 1 A B x y A 18 B 26 -4 2 A a B 6 a 2 a 3 a a=2 a=3 2 A 4 B 3 A 3 B -8 21 (1) OC CD O C OC CD AD CD OC AD DAC= ACO OA =OC OAC= ACO DAC= CAO AC DAB -3 (2) BC AB O ACB=90 = ADC DAC= CAO ADC ACB AB AC AC AD 32 5 AD AC=8 AB=10. -5 E AB ACE=45 A CE F CF =AE=ACsin4
3、5 = 2 8 =4 2 2 Rt ACB 22 10 8 6 BC 84 tan tan = 63 EB Rt AEF 4 tan = 3 AF E EF 3 = 4 2 3 2 4 EF =4 2 3 2 7 2 CE -8 22.(1) B ) 5 , 1 ( C ) 2 , 2 5 ( x -1 0 x 2 5 -2 (2) A 0 P m n AB 3 2 m n 2 3 1 m 0 n 5 P n PD x D P n D n PD= + S= nPD PAD S= nPD= + n= n 2 + n= P S -5 (3)(4, 4 5 ) -8 23.(1)3; -3 (2)
4、AD G, AG=DE; EG, EF AD F. F . OA,OG,OF,OE. AOG DOE, AOG= DOE, EOG= DOA=90 , EOF GOF EOF= GOF=45 . -7 (3) OC, ECO= EOF= OAF=45 , EOC= AFO COE AFO CE OA OE OF CO AF CE OA CO AF OE OF OE OF CE AF 2 2 ) 3 2 2 ( ) ( OE OF = 9 8 . -10 24 (1)y= x+1 2 3 D(-1,-3) -3 (2) OBC BE y E, E EF BC, C, OE=t,EF=t, CEF
5、 CBO t=1, BE 1 2 1 x y BP BE 1 2 1 - x y P( 4 15 , 2 11 ) -7 3 P x 1 y 1 Q x 2 y 2 H 1 0 PQ y=kx+b k+b=0 b=k y=kx+k + k x k=0 x 1 +x 2 = 2+3k y 1 +y 2 =kx 1 +k+kx 2 +k=3k 2 M PQ M k 1 k 2 -8 N DN PQ DN y=kx+k 3 x 1 = 1 x 2 =3k 1 N 3k 1 3k 2 3 -9 DN=DM 3k 2 + 3k 2 2 = 2 + 2 3k 4 k 2 4=0 k 2 +1 0 3k 2 4=0 k= k 0 k= -10 P 3 1 6 M 1 2 N 2 1 1 PM=DN=2 PM DN DMPN DM=DN DMPN DP DMPN N 2 1 1 -12
